Show number of new posts since last visit based on cookie WordPress

Jens Filipsson comments:

Hey and thank you!

This seems to be a working solution, the latest item is added to the menu, but the only thing not happening is the number showing up.

Right now I'm trying it locally on MAMP, could this be a problem? Not sure if cookies works on MAMP?

// Jens.

timDesain Nanang comments:

the code should be working properly.

- if the cookie (lastvisit) is not set, then set the cookie (lastvisit) with the current time
- the number not showing up, because there is no posts after lastvisit (the current time)

put the following code for debugging:

function wpq11504_wp_footer() {
if(isset($_COOKIE['lastvisit'])){
$lastvisit = $_COOKIE['lastvisit'];
echo '<p>Cookie timestamp: '.$lastvisit.'</p>';
echo '<p>Cookie Ymd: '.date( "Y-m-d H:i:s", $lastvisit).'</p>';
}
else{
echo '<p>Cookie is not set.</p>';
}
echo '<p>Num Latest Posts: '.wpq11504_count_latest_posts().'</p>';
}
add_action('wp_footer', wpq11504_wp_footer );



or you can try change this line (current year)
'year' => date("Y", $lastvisit),
with (last year)
'year' => date("Y", $lastvisit)-1,

Jens Filipsson comments:

Ok, the cookie seems to have set:

<em>Cookie timestamp: 1440156828

Cookie Ymd: 2015-08-21 11:33:48

Num Latest Posts: 0</em>

But, when I add a new post and then visit the blog (not logged in), it doesn't update Num Latest Posts. It's still 0.

Jens Filipsson comments:

Ok! When changing Year to last year, it worked! 13 new posts. Any ideas why?

Jens Filipsson comments:

But: The cookie doesn't reset when I visit http://site.com/?show=latest.

Still says 13 posts.

Jens Filipsson comments:

Oh, wait. You only break it down to days, right? Maybe we need to break it down to at least minutes?

timDesain Nanang comments:

<blockquote>Ok! When changing Year to last year, it worked! 13 new posts. Any ideas why?</blockquote>
before:
lastvisit = <strong>2015-08-21 11:33:48</strong>
because there is no posts after the current time (it is future post)

after:
lastvisit = <strong>2014-08-21 11:33:48</strong>
there are 13 posts after this time

here is another way for debugging (on localhost):
- change the year to the original code
'year' => date("Y", $lastvisit),
- reset/ delet your cookie
- change your pc date setting to 2014-08-21 (last year)


<blockquote>But: The cookie doesn't reset when I visit http://site.com/?show=latest. </blockquote>
actually the cookie was reseted to the new value, try to open another page

Jens Filipsson comments:

But right now it only checks posts from the same day, right? I think we need to check minutes! We post many articles every day.

'year' => date("Y", $lastvisit)-1,

'month' => date("n", $lastvisit),

'day' => date("d", $lastvisit),

Jens Filipsson comments:

You're right about the cookie btw, it did update. But we need to check down to at least a minute, so that returning visitors can see if there are new articles today...

timDesain Nanang comments:

you can modified the date_query

// count latest post after latest visit
function wpq11504_count_latest_posts() {
if ( is_admin() ) return;

if(isset($_COOKIE['lastvisit'])){
$lastvisit = $_COOKIE['lastvisit'];

//modified the last visit time
$make_time = gmmktime(
date("H", $lastvisit)-5, //hour
date("i", $lastvisit)-4, //minutes
date("s", $lastvisit),
date("n", $lastvisit),
date("j", $lastvisit), //day
date("Y", $lastvisit)
);
$after_this = date("Y-m-d H:i:s", $make_time);

//https://codex.wordpress.org/Class_Reference/WP_Query#Date_Parameters
$args = array(
'posts_per_page' => -1,
'post_type' => array('post'),
'ignore_sticky_posts' => 1,
'date_query' => array(
array(
'column' => 'post_date_gmt',
'after' => $after_this,
),
),
);
$wpq = new WP_Query( $args );

return $wpq->found_posts ;
}
else return;
}


Jens Filipsson comments:

Thanks, worked like a charm! Have voted you the price!